I'm near Edmonton. Zone 3. Suppose I took a zone 5 hardy Japanese maple, like Emporer's Blood and put it in a #15 pot with insulated sides. In the fall, leave it out until leave fall. Put it on a concrete pad, and pile around with strawbales or dried leaves. This allows the ground temps to stabilize the root ball temps. When temps get down to zone 5'ish (-25 C) bring it into a cool room with south facing window. Keep inside until frost danger is past. Move out to the deck. So the plant would have 3 locations during the year. *** How does A. palmetum determine when to break bud? Temperature, day length? Does it have a chilling requirement? This is essentially creating an 8 month growing season for it. Would the leaves wear out in that time?